A wind resource calculation area optimization method based on OpenFOAM

A technology for calculating area and wind resources, applied in the field of wind resource assessment, which can solve the problems of inaccurate calculation, large result error, and different inflow boundary conditions.

Active Publication Date: 2019-04-09
华润电力技术研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the inflow boundary condition is a theoretical wind profile, the altitude is not considered
Therefore, different calculation area selections will directly lead to different altitudes of the inflow wind profile
[0004] In short, the existing methods for determining the wind resource calculation area can only be calculated by setting a single default distance, resulting in different inflow boundary conditions, resulting in inaccurate calculations and large error in the results

Method used

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  • A wind resource calculation area optimization method based on OpenFOAM
  • A wind resource calculation area optimization method based on OpenFOAM
  • A wind resource calculation area optimization method based on OpenFOAM

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Experimental program
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Embodiment 1

[0058] refer to Figure 1-2 , the first embodiment of the present invention provides an OpenFOAM-based wind resource calculation area optimization method, including:

[0059] Step S100, within the range of the target area, determine the main wind direction within the range of the target area according to the measured data of the wind measuring tower;

[0060] Above, the range of the target area is an area within the range of the topographic map that needs to be tested and calculated, and the area has a definite size range. For example, a 10km×10km square area in a city center is taken as the target area.

[0061] As mentioned above, it needs to be explained that the wind measuring tower is a towering tower structure used for measuring wind energy parameters, that is, a tower-shaped structure used for observing and recording the movement of airflow near the surface. In the past, most of them were built by wind power enterprises, meteorological and environmental protection dep...

Embodiment 2

[0076] refer to Figure 4-6 , the second embodiment of the present invention provides an OpenFOAM-based wind resource calculation area optimization method, based on the above figure 2 In the first embodiment shown, the step S300, "Based on the boundary conditions and initial values ​​of OpenFOAM, according to the different distances to be analyzed corresponding to the minimum radius, perform iterative calculations respectively through the OpenFOAM model to obtain each of the "Iterative calculation range corresponding to the distance to be analyzed" includes:

[0077] Step S310, obtaining a preset step size of outward expansion and a preset maximum distance of outward expansion;

[0078] As mentioned above, it should be noted that currently commonly used wind resource assessment software includes: WAsP, WindFarmer, WindSim, WT, and WindPRO, etc. The method for selecting the calculation area in wind resource assessment is to expand the area of ​​interest (by yourself) A defau...

Embodiment 3

[0100] refer to Figure 7 , the third embodiment of the present invention provides an OpenFOAM-based wind resource calculation area optimization method, based on the above figure 2 In the first embodiment shown, in the step S400, "verify each iterative calculation range through the measured data of each wind measuring tower, and determine the optimal wind resource calculation area according to the verification result "include:

[0101] Step S410, calculating the sum of the absolute values ​​of the errors between the measured data at the position of each wind measuring tower and the iterative calculation range, as the calculation error value, and generating a verification result including the calculation error value;

[0102] The above-mentioned iterative calculation range includes at least one wind-measuring tower, and the error calculation is performed on the iterative calculation range by using the measured data of the position of each wind-measuring tower to calculate the...

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Abstract

The invention provides a wind resource calculation area optimization method based on OpenFOAM, and the method comprises the steps: determining the main wind direction of a target area range in the target area range according to the actual measurement data of a anemometer tower, and determining the boundary condition and an initial value of an OpenFOAM model; Determining the minimum radius of the minimum calculation area range according to the position of the anemometer tower in the target area range; According to different to-be-analyzed distances corresponding to the minimum radius, performing iterative computation through an OpenFOAM model to obtain an iterative computation range corresponding to each to-be-analyzed distance; Verifying the actual measurement data of each anemometer tower, and determining an optimal wind resource calculation area. According to the method, iterative computation of the main wind direction sector and different topographic map sizes is realized, a multi-anemometer tower is used for verifying and computing a mutual inference error, the optimal computation area size is searched, and CFD computation uncertainty caused by inflow boundary conditions of a complex terrain can be remarkably reduced.

Description

technical field [0001] The present invention relates to the technical field of wind resource assessment, and more specifically, relates to an OpenFOAM-based wind resource calculation area optimization method. Background technique [0002] In the wind resource assessment work, the site topographic map is an important input file, which will have a significant impact on the accuracy of wind resource calculation. This effect is particularly noticeable in projects with complex terrain. Because different calculation ranges are selected, the terrain at the entrance of the calculation area changes accordingly, that is, the inflow boundary conditions change. [0003] At present, commonly used wind resource assessment software includes: WAsP, WindFarmer, WindSim, WT and WindPRO, etc. The method for calculating area selection in wind resource assessment is to extrapolate a default distance in the area of ​​interest (selected by yourself), and the commonly used one is five kilometers....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02A90/10
Inventor 兰水泉王铁强张幼曾垂宽葛文涛袁兴德鞠苏荣覃荣君逄增强张云超
Owner 华润电力技术研究院有限公司
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